What’s DNS?
DNS indicate name System/Service. It’s accustomed resolve FQDN (Fully qualified domain name) to information science address and the other way around appreciate web.example.com to 184.59.51.27 and the other way around.
What number styles of DNS?
There square measure 2 styles of DNS server:
Authoritative DNS
Non-Authoritative DNS
What number styles of zone in DNS?
There square measure 3 styles of Zone in DNS:
Primary Zone
Secondary Zone
Stub Zone
What’s stub zone?
Stub zone contains Name Server record, SOA and SRV info of network that helps to resolve quick question and assign best path.
What are Secondary zone and the way will it completely different from primary zone?
Secondary zone is copy of primary zone, it’s contain browse solely information of primary zone whereas primary zone contains main information of DNS Server. once primary zone fail to reply then secondary zone resolve consumer question. It’s suggests that fault tolerance additionally.
What’s DDNS?
Dynamic DNS or DDNS could be a methodology of change, in real time, a site Name System to purpose to a dynamic scientific discipline address on the web. this is often wont to give a persistent name for a resource which will amendment location on the network.
What area unit the resource records in DNS?
A (Address) Maps a number name to Associate in nursing scientific discipline address. once a laptop has multiple adapter cards and scientific discipline addresses, it ought to have multiple address records.
What area unit a Forward and Reverse Look up?
Forward Look up: once a reputation question is send to the DNS server against to scientific discipline address, it’s typically aforesaid a forward operation.
Reverse Look up: DNS conjointly provides a reverse operation method, sanctionative purchasers to use a glorious scientific discipline address throughout a reputation question and appearance up a laptop name supported its address.
What’s Primary zone?
This is the browse and writable copy of a zone get into the DNS name space. this is often primary supply for data regarding the zone and it stores the creation of zone information in an exceedingly native file or in AD DS. metallic element default the first zone file is known as as zone_name.dns in %windir%\System32\DNS folder on the server.
What’s Secondary zone?
This is the browse solely copy of a zone get into the DNS namespace. this is often secondary supply for data regarding the zone and it get the updated data from the creation of primary zone. The network access should be accessible to attach with primary server. As secondary zone is simply a replica of a primary zone that’s hosted on another server, it can’t be keep in AD DS.
What’s A record?
A record is employed to resolve Name (www.example.com) to IP Address (61.95.234.98). It creates in Forward search zone.
What’s distinction between A record and AAAA record?
A record known as as host record conjointly. it’s accustomed resolve Name to IP Address in IPv4 Address whereas AAAA record same work however it use in IPv6 Address.
What’s PTR record?
PTR symbolize Pointer record. it’s accustomed resolve IP Address to call like computer network.example.com to 61.95.125.45. It creates in Reverse search zone.
What’s SOA?
SOA symbolize begin of Authority record. It record is info of DNS zone this zone and regarding alternative zone. every zone contains single SOA record.
What’s SRV record?
SRV symbolize Service surveyor record. It contains of all service info of DNS Server like port, target, priority and then on.
What’s CName/ Alias record?
Canonical Name/Alias record is employed to specify that a website name is associate degree alias for one more domain akin to host name check.example.com alias name World Wide Web.example.com.
What’s Mx record?
Mx signify Mail money dealer record. This record use in mail server and answerable for acceptive email messages on behalf of recipient’s domain.
That port is employed by DNS server?
Port: fifty three
What’s the Name server and the way to spot it?
Nameserver may be a server on the web to handle queries concerning the situation of a website name’s numerous services. they permit victimisation domains rather than information science addresses.
What’s spherical Robin DNS?
Spherical Robin DNS is technique that wont to load distribution, load equalization or fault-tolerance web protocol service host like FTP server, web server and manage the DNS response to deal with requests from consumer computers.